Windmill.



110.349,191. -PATBNTED 1.3.2, 1907.

E. P. BERGMAN.

WINDMILL.

APPLIGATION PILBD'APR. 17. 1906.

STABS PATENT FFIQF.

WINDIVIILL.

Specification of Letters Patent.

.Patented April 2, 1907.

Application filed April 17, 1906. Serial No. 312,099.

T0 a/ZZ whom it may con/cern.

Be it known that I, Enron I. BERGMAN, a citizen of the United States,residing at Concordia7 in the county of Cloud and State of Kansas, haveinvented new and useful Improvements in 1Windmills, of which thefollowing is a specification.

This invention appertains to improvements in windmills, and relates moreparticularly to the construction of the wind-wheel, the constructionthereof being such as to provide means for supporting the blades andvarying the angle thereof, such improvements embodying a hub that isrigidly attached to the driving-shaft, such hub having a solid frontportion and a rearward-extending casing that covers the slide which ismounted on the shaft, the hub having attached thereto braces andsupports for rings that carry the blades and the means for adjusting theblades, as will be hereinafter set forth.

In the accompanying drawings, forming a part of this specification,Figure l is a front elevation of a part of a wind-wheel made in accordwith my invention. Fig. 2 is a vertical section, and Fig. 3 a rearelevation of a portion of the wheel.

The wheel A is mounted on a suitably-supported shaft B, that turns inbearings carried by the turn-table, such wheel including in itsconstruction a hub B, that is made fast to the shaft B. The hub has asolid 'front p0rtion, which is circumferentially recessed to provideflanges b and t', and from the outer circumference of the rear iiangethere extends a casing or conical cap B, which overlies the slidingcollar C, that is mounted on the shaft B to turn therewith. The slidingcollar or sleeve C has a recess to receive the forked endJ of aslide-bar which is carried by the turn-table, the innerend thereof beingattached to a bell-crank lever c, which is pivoted to a support thatprojects from the turn-table. The slide has a forwardly-projectingflange with openings for the reception of the ends of rods that areturned when the slide is moved, such rods moving a ring that isconnected to the blades of the wheel to change the angle of the blades.

The rigid frame of the wheel includes a ring E, which is secured to thehub C by means of brace-rods e and e', the rods e being secured to theouter face of the ange b and beneath the inner ends of the rods e, theiimer ends of such rods e being secured to the cap or casing B. To thefront flange t of the hub there are secured brace-rods f, the outer endsof such rods being fastened to a ring F, and from the ring F to theflange at the rear edge of the casing B extend rods f. The rods e e andf f hold the ringsE and F concentric, and such brace-rods are preferablymade of flat bars, the wider sides being positioned so that the narrowedges will be positioned in the direction of the rotation of the wheel,and it will be noted that the longer brace-rods are at the front of thewheel, where the strain will normally tend to eX- tend the rods, andthat the shorter bars are to the rear, where the strain tends to bendthe bars. The longer and shorter brace-rods alternate, and about midwaybetween the rings E and F there is secured to the bars f a ring G, suchring having bearings g g for the outer ends of the do uble-crank rods71. h.

The cranks formed on the inner and outer ends of the rods 71, 7L engagethe horizontal flange of the collar or sleeve C and perforations in amovable ring H, so that when the sleeve is moved the ring H will beturned, and as the ring is connected to the blades they will be movedwith the ring.

The rings E and F, which constitute a part of the rigid frame of thewheel, have perforations or bearings for pins upon which the blades Imove. The pins c' fi project from braces attached to the blades, thepins i intersecting openings through the blades for the passage of theouter ring F.

The blades I carry hooks c, the outward bent ends thereof being passedthrough openings in the ring H, so that when the ring is turned theblades will be moved in unison to place the wheel either in or out ofoperation.

A wind-wheel made in accord with my inventio'n may be cheaplymanufactured, the same will be thoroughly braced, and the angle of theblades may be quickly `and easily changed. The conical casing willprotect the sliding sleeve and the part of the shaft upon which thesleeve slides from the weather.

Having thus set forth my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. In a wind-wheel, a shaft having rigidly attached thereto a hub, arearward-extending casing that is integral with the hub, a slideattached to the shaft within the casing and provided with aforwardly-extending flange, means for moving the slide on the shaft,converging brace-rods carried by the hub, concentric rings attached tothe brace- IOO IIO

rods, blades p'ivotally attached to the concentric rings and providedWith hooks that rojectoutvvard from the front edges of each of theblades, a ring carried by the hooks and crank-bars connected to themovable ring carried by the blades and to the flange of the slide, forthe purpose set forth.

2. In a Wind-Wheel, a shaft to Which is rigidly secured a hub, arearward-extending casing formed integral With the front portion of thehub, a slide movable on the shaft Within the casing, tWo series ofbrace-rods attached to the hub and to the casing, concentric ringshaving bearings for the blades of the Wheel carried by the outer ends ofthe brace-rods, a ring attached to the outer brace-rods, crankbarscarried by said ring and the hub, a ring movable by the crank-bars suchring being connected to the blades of the Wheel, substantially as shown.

ERICK P. BERGMAN.

Witnesses:

CLYDE L. SHORT, ROBERT MrssELL.

